Zinus is not worth the hassle of having to return their poorly manufactured products. Assembling the bed I found the parts in the last step were the wrong size. These are the two small feet that support the center of the bed. Mine were about 1/2″ too tall meaning the rest of the frame does not make contact with the floor and is unstable.

https://www.amazon.com/Zinus-Ironline-Platform-Headboard-Footboard/dp/B075FF1FH9